Method for producing paint brush bristles

Details Method for producing paint brush bristles Method for producing paint brush bristles

1990-10-15

1992-09-29

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264148, 2642108, B29C 6722

Patent

active

051512297

ABSTRACT:
A method of producing synthetic microcellular paint brush bristles having a roughened surface replicating a hog bristle which includes incorporating and dispersing a blowing agent into a molten extrusion mix and thereafter extruding and drawing the molten material in a manner to allow the dispersed foaming agent to expand, rupture and roughen the surface of the bristle.

REFERENCES:
patent: 2695835 (1954-11-01), Hare
patent: 3112160 (1963-11-01), Rush
patent: 3118161 (1964-01-01), Cramton
patent: 3214234 (1965-10-01), Bottomley
patent: 3239865 (1966-03-01), Munt
patent: 3411979 (1968-11-01), Lewis, Jr.
patent: 3554933 (1971-01-01), Grainger
patent: 3594459 (1971-07-01), Keuchel
patent: 3706111 (1972-12-01), Curtin et al.
patent: 4376746 (1983-03-01), Ward et al.
Modern Plastics Encyclopedia, 1986-1987, "Foaming Agents" by Raymond Shute.
Eaton, Christopher, "Extruding Thermoplastic Foams", pp. 150, 152, 154, 243 and 244.

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